Bullet for infantry ammunition

ABSTRACT

The invention relates to a bullet for infantry ammunition comprising a bullet core ( 1 ), a bullet tip ( 13 ), and a metal case ( 2 ). The aim of the invention is to create a durable connection between the bullet core ( 1 ) and the metal case ( 2 ). To this end, the metal case ( 2 ) is a shell, which is open at the front and which is pulled onto the bullet core ( 1 ) from the rear. The bullet tip ( 13 ) projects away from the metal case ( 2 ), and a constriction ( 4 ) is provided on the bullet core ( 1 ). The case end ( 5 ) that is open at the front projects into this constriction.

[0001] The invention relates to a projectile for infantry ammunitionaccording to the preamble of claim 1.

[0002] Projectiles for infantry ammunition in a known manner comprise aprojectile core with a projectile nose and a metal casing, wherein theprojectile core is made of lead. Firing lead projectiles generateslead-containing gases, which are detrimental to health. Lead moreoverpollutes the environment.

[0003] The underlying object of the invention is to improve a projectilefor infantry ammunition according to the preamble of claim 1 in such away that a durable connection between projectile core and metal casingis achieved.

[0004] According to the invention this object is achieved in that themetal casing is a case, which is open at the front end and is drawn fromthe rear onto the projectile core, wherein the projectile nose projectsfrom the metal casing and there is disposed on the projectile core anecking, into which the open front casing end projects.

[0005] The necking therefore holds the metal casing fast and preventsthe latter from being pulled off upon penetration into a non-rigidmedium. It is moreover highly advantageous that the casing endconsequently lies in the flow shadow of the projectile nose.

[0006] In an advantageous development of the invention the projectilecore is made of hardenable steel, tungsten, metal carbides, sinteredmetals or ceramic material.

[0007] The metal casing is preferably made of copper, a copper alloy,clad steel, soft iron or a zinc-tin alloy.

[0008] Advantageously at least one relief groove is disposed on theouter periphery of the projectile core, wherein the metal casing mayrest in the region of the relief groove against the projectile core.These relief grooves may be of differing diameters and widths and may bearranged distributed over the entire length of the projectile.

[0009] A twist transmission is effected by the projectile portionshaving diameters that match the appropriate projectile calibre.

[0010] The base of the metal casing advantageously has a greaterthickness than the wall thickness of the cylindrical part. The thicknessof the base of the metal casing may however alternatively be less thanor equal to the wall thickness of the cylindrical part. The base may beconvex or concave with e.g. radii of between 0.5 and 10 calibres orflat. Alternatively the base of the metal casing may form a concave orconvex cone point.

[0011] The shape of the rear of the metal casing may be conical with anangle of between 0° and 90°. The rear is the region of the metal casingadjoining the base.

[0012] The projectile core is advantageously roughened or knurled,thereby achieving a better seating of the projectile casing and/or metalcasing on the projectile core.

[0013] Further features of the invention arise from the single drawing,which is described below.

[0014] The reference character 1 denotes the projectile core, which ismade of hardenable steel, tungsten, metal carbides, sintered metals orceramic material. The projectile core 1 has a projectile nose 13, whichprojects from a metal casing 2.

[0015] The metal casing 2 is made either of copper, a copper alloy, cladsteel, soft iron or a zinc-tin alloy. Other metals are however alsoconceivable.

[0016] The metal casing 2 is drawn from behind, i.e. from the rear 12onto the projectile core 1, wherein the projectile nose 13, as alreadymentioned, is exposed.

[0017] For the durable fastening there is disposed on the projectilecore 1 a necking 4, into which the open front casing end 5 projects. Thecasing end 5 therefore lies in the flow shadow of the projectile nose13.

[0018] The diameter of the projectile nose is smaller than the fielddiameter.

[0019] Provided on the outer periphery of the projectile core 1 there isin this particular case a single relief groove 7, whereby the metalcasing 2 rests against the projectile core 1. It is however alsopossible to select a form of construction having a plurality of reliefgrooves, e.g. of differing widths and diameters.

[0020] A twist transmission is effected by projectile portions havingcylinder diameters that match the appropriate projectile calibre (seee.g. portions 9).

[0021] The base 10 of the metal casing 2 has a greater thickness thanthe wall thickness in the cylindrical region. In this embodiment thebase is flat. It may however alternatively be convex or concave withradii of between 0.5 and 10 calibres. The base shape may also beconfigured as a convex or concave cone point.

[0022] In the embodiment illustrated here, the rear 12 adjoining thebase is of a cylindrical design. It may however alternatively becone-shaped.

[0023] The projectile nose may be of any conventional shape, e.g. frompointed to flattened.

1. Projectile for infantry ammunition comprising a projectile core (1)with a projectile nose (13) and a metal casing (2), characterized inthat the metal casing (2) is a case, which is open at the front end andis drawn from behind onto the projectile core (1), wherein theprojectile nose (13) projects from the metal casing (2) and there isdisposed on the projectile core (1) a necking (4), into which the openfront casing end (5) projects.
 2. Projectile according to claim 1,characterized in that the projectile core (1) is made of hardenablesteel, tungsten, metal carbides, sintered metals or ceramic material. 3.Projectile according to claim 1, characterized in that the metal casing(2) is made of copper, a copper alloy, clad steel, soft iron or azinc-tin alloy.
 4. Projectile according to claim 1, characterized inthat at least one relief groove (7) is disposed on the outer peripheryof the projectile core (1).
 5. Projectile according to claim 4,characterized in that the metal casing (2) rests in the region of therelief groove (7) against the projectile core (1).
 6. Projectileaccording to claim 1, characterized in that the base (10) of the metalcasing (2) has a greater thickness than the wall thickness of thecylindrical part.
 7. Projectile according to claim 1, characterized inthat the base (10) of the metal casing (2) is convex or concave withradii of between 0.5 and 10 calibres or flat.
 8. Projectile according toclaim 1, characterized in that the base (10) of the metal casing (2)forms a concave or convex cone point.
 9. Projectile according to claim1, characterized in that the shape of the rear of the metal casing (2)is conical with angles of between 0° and 90°.
 10. Projectile accordingto claim 1, characterized in that the projectile core (1 ) is roughenedor knurled.